thus reducing the cost and the ra cast-iron box such as those used f is not thermostated since a consta?
Thermocouples FIG. 13.ŚMultiple installation with single indicator.
0 O o O
FIG. 14.ŚMultiple installation with junction box.
It is merely necessary to have a uniform temperature in the box. This is secured when the box is constructed of heavy metal. The electromotive force developed at the junctions of compensating leads and copper leads is compensated for by a common junction in the opposite direction inserted between the selective switch